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United States Patent | 6,239,062 |
Cribbs | May 29, 2001 |
A constrained geometry single-site olefin polymerization catalyst is described. The catalyst comprises an activator and an organometallic compound that includes a Group 3 to 10 transition or lanthanide metal, M, and a multidentate ligand characterized by an indolyl group that is covalently linked to an amido group, wherein the indolyl group is .pi.-bonded to M and the amido group is .sigma.-bonded to M. The indolyl-amido ligand is formed from readily available organic compounds and allows easy synthesis of a constrained geometry catalyst system.
Inventors: | Cribbs; Leonard V. (Hamilton, OH) |
Assignee: | Equistar Chemicals, L.P. (Houston, TX) |
Appl. No.: | 388881 |
Filed: | September 2, 1999 |
Current U.S. Class: | 502/167; 502/103; 502/123; 502/152; 502/155; 502/169; 502/200; 526/128; 526/141; 526/160; 526/943 |
Intern'l Class: | B01J 021/00; B01J 021/06; B01J 023/24; B01J 023/38; B01J 023/46 |
Field of Search: | 502/103,123,152,158,167,169,200 526/128,141,160,943 |
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Foreign Patent Documents | |||
WOA 96/13529 | May., 1996 | WO. |